the u.s. searches everywhere. posters with the missing navy men's faces hang at checkpoints. "this american troop is missing," it reads. "reward for his return, $20,000." "the search is still ongone," said the local government spokesman. "but we still don't have any clues of where they are." the taliban say they know. a spokesman claims insurgents got into a fire fight with the men and killed one of them, then took the survivor to a, quote, safe place. the u.s. says it can't confirm that. >> it is a reminder of both the dangers, as well as the care, with which we must take in terms of executing the totality of the mission here. and we will do all we can. >> reporter: the two navy personnel left kabul down this road into logar province. it's an example of security deteriorating here. we're only a few miles from downtown kabul, but this is as far as i can go down this road. beyond me, the risk of kidnapping and an attack is high. >> release me, please. >> reporter: the only other american in tal